Rockwell Automation 1769-OF4VI Compact I/O Isolated Analog Modules - Manual (Page 12)

Publication 1769-UM014B-EN-P - May 2010
1-4 Overview
General Diagnostic Features
The analog modules contain diagnostic features that can help you identify the
source of problems that may occur when cycling power or during normal
channel operation.
These power cycle and channel diagnostics are explained in chapter 5.
System Overview
The modules communicate to the controller through the bus interface. The
modules also receive 5 and 24V dc power through the bus interface.
You can install as many analog modules as your power supply can support.
However, the modules may not be located more than eight modules away from
the system power supply.
Figure 1.3 Determine Power Supply Distance
1
1 1 2 3 4 3 2
2 3 4
System Power Supply
Compact I/
O
Compact I/O Compact I/O
En
d Ca
p
Co
mp
actLog
ix Co
nt
roller
or
I/O
Commu
nicat
io
n
Ada
pte
r
Compact I/O Compact I/O Compact I/O
or
Power Supply Distance
Compact I/O Compact I/O Co
m
pa
ct
I/
O
Compact I/O
En
d Cap
MicroLogix 1500 Controller
with Integrated System
Power Supply
Power Supply Distance